<template>
  <div>
             <!-- 面包屑导航区域 -->
     <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>      
     </el-breadcrumb>
            <!-- 卡片视图 -->
     <el-card>
         <!-- 添加角色按钮 -->
         <el-row>
             <el-col>
                 <el-button type="primary">添加角色</el-button>
             </el-col>
         </el-row>
         <!-- 角色列表区域 -->
         <el-table :data="rolelist" border stripe>
             <!-- 展开列 -->
             <el-table-column type="expand">
                 <template slot-scope="scope">
                     <el-row v-for="(item1, i1) in scope.row.children" :key="item1.id" :class="['bdBottom',i1===0 ? 'bdTOP' : '','vcenter']">
                         <!-- 渲染一级权限 -->
                         <el-col :span="5">
                            <el-tag closable @close="removeRightById(scope.row,item1.id)"> {{item1.authName}}</el-tag>
                            <i class="el-icon-caret-right"></i>
                         </el-col>
                         <!-- 渲染二级和三级权限 -->
                         <el-col :span="19">
                             <!-- 通过for循环嵌套二级循环 -->
                             <el-row :class="[i2===0 ? '' : 'bdTOP','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                                 <el-col :span="6">
                                     <el-tag closable @close="removeRightById(scope.row,item2.id)" type="success">{{item2.authName}}</el-tag>
                                     <i class="el-icon-caret-right"></i>
                                 </el-col>
                                 <el-col :span="18">
                                     <el-tag type="warning" v-for="(item3,i3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                                 </el-col>
                             </el-row>

                         </el-col>

                      </el-row>

                     <!-- <pre>
                         {{scope.row}}
                     </pre> -->
                 </template>
             </el-table-column>
             <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="角色名称" prop="roleName"></el-table-column>
            <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
             <el-table-column label="操作" width="300px">
                 <template slot-scope="scope">
                     <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
                    <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
                     <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                 </template>
             </el-table-column>
         </el-table>
     </el-card>
     <!-- 分配权限的对话框 -->
     <el-dialog
  title="分配权限"
  :visible.sync="SetRightDialogVisible"
  width="50%" @close="SetRightDialogClosed" >
  <!-- 树形控件 -->
 <el-tree :data="rightsList" :props="treeProps" node-key="id" show-checkbox default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
  <span slot="footer" class="dialog-footer">
    <el-button @click="SetRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
</el-dialog>
  </div></template>

<script>
export default {
    data(){
        return{
            rolelist:[],
            //控制分配权限对话框的显示与隐藏
            SetRightDialogVisible:false,
            //所有权限列表
            rightsList:[],
            //树形控件的属性绑定对象
            treeProps:{
                label:'authName',
                children:'children'
               
            },
            //默认选中的节点id值数组
            defKeys:[],
            //当前即将分配角色的id
            roleId:''
        }
    },
    created(){
        this.getRoleList()
    },
    methods:{
       async getRoleList(){
          const {data:res}= await this.$http.get('roles')
          if(res.meta.status!==200){
              return this.$message.error('获取列表失败')
          }
          this.rolelist=res.data
        //   console.log(this.rolelist)
        },
        //根据id删除对应权限
       async removeRightById(role,rightId){
            //弹框询问用户是否删除
        const confirmResult= await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
     ).catch(err=>err)
     if(confirmResult!=='confirm'){
         return this.$message.info('已经取消删除')
     }
        // console.log('确认了删除')
      const {data:res}= await this.$http.delete('roles/'+role.id+'/rights/'+rightId)
      if(res.meta.status!==200){
          return this.$message.error('删除失败')
      }
        //   this.getRoleList()
        //这里直接调用获取数据函数会导致删除之后展开数据行关闭，为了解决这个问题，可以重新获取当前的权限即可
        role.children=res.data
        },
        //分配权限对话框
       async showSetRightDialog(role){
           this.roleId=role.id
            //获取所有权限的数据
          const {data:res}= await this.$http.get('rights/tree')
          if(res.meta.status!==200){
              return this.$message.error('获取权限失败')
          }
          //把获取道德数据保存到data中
            this.rightsList=res.data
            // console.log(this.rightsList)
            //通过递归获取三级节点的id
            this.getLeafKeys(role,this.defKeys)
            this.SetRightDialogVisible=true
        },
        //通过递归的形式，获取角色下所有的三级权限的id,并保存到defKeys数组中
        getLeafKeys(node,arr){
            //如果当前node节点不包含children属性，则是三级节点
            if(!node.children){
                return arr.push(node.id)
            }
            node.children.forEach(item=>this.getLeafKeys(item,arr))
        },
        //监听分配权限对话框的关闭
        SetRightDialogClosed(){
            this.defKeys=[]
        },
        //点击为角色分配权限
       async allotRights(){
            const keys=[
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedNodes()
            ]
            // console.log(keys)
            const idStr=keys.join(',')
          const {data:res}= await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
          if(res.meta.status!==200){
              return this.$message.error('分配权限失败')
          }
            this.$message.success('分配权限成功')
            this.getRoleList()
            this.SetRightDialogVisible=false
        }
    }
}
</script>

<style lang="less" scoped>
    .el-tag{
        margin: 8px;
    }
    .bdTOP{
        border-top: 1px solid#eee;
    }
    .bdBottom{
        border-bottom: 1px solid #eee;
    }
    .vcenter{
        display: flex;
        align-items: center;
    }
</style>